Assuming the atomic mass of a metal M to be 56,calculate the empirical formula of its oxide containing 70.0% M.

A hydrocarbon contains 7.7 % hydrogen. calculate the empirical formula.

The formula of metal carbonate of a metal M is M2CO3. What is the formula of its iodide.

An organic compound has the following percentage composition : C= 48%, H= 8% N= 28% and rest of oxygen. Calculate the empirical formula of the compound.

The formula of metal carbonate of a metal M is M2CO3. What is the formula of its nitride.

A jug contains 2L of milk. calculate the milk in m3.

The formula of metal carbonate of a metal M is M2CO3. What is the formula of its phosphate.

Find the empirical formula of a compound containing 17.7% hydrogen and 82.3% nitrogen.

Calculate the pH of 0.003 M HCl.

The empirical formula of the compound is CH3. Calculate the molecular formula if molecular mass is 30.

An inorganic salt gave the following percentage composition : Na= 29.11%, S= 40.51% and O= 30.38%. Calculate the empirical formula of the salt. (At. Mass Na= 23, S=32)